Measurement of η photoproduction on the proton from threshold to 1500 MeV

被引：97

作者：

Bartalini, O.

Bellini, V.

Bocquet, J. P.

Calvat, P.

Capogni, M.

Casano, L.

Castoldi, M.

D'Angelo, A.

Didelez, J.-P.

Di Salvo, R.

Fantini, A.

Franco, D.

Gaulard, C.

Gervino, G.

Ghio, F.

Giardina, G.

Girolami, B.

Giusa, A.

Guidal, M.

Hourany, E.

Kunne, R.

Lapik, A.

Sandri, P. Levi

Lleres, A.

Mammoliti, F.

Mandaglio, G.

Moricciani, D.

Mushkarenkov, A. N.

Nedorezov, V.

Nicoletti, L.

Perrin, C.

Randieri, C.

Rebreyend, D.

Renard, F.

Rudnev, N.

Russew, T.

Russo, G.

Schaerf, C.

Sperduto, M.-L.

Sutera, M.-C.

Turinge, A.

Vegna, V.

机构：

[1] Univ Grenoble 1, Inst Natl Polytech Grenoble, LPSC, CNRS,IN2P3, F-38026 Grenoble, France

[2] Univ Roma Tor Vergata, Dipartmento Fis, I-00133 Rome, Italy

[3] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy

[4] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy

[6] Ist Nazl Fis Nucl, Sez Catania, I-95123 Catania, Italy

[7] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[8] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[9] Ist Nazl Fis Nucl, Sez Roma, I-00133 Rome, Italy

[10] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[11] Ist Super Sanita, I-00161 Rome, Italy

[12] Univ Catania, Dipartimento Fis & Astron, I-95123 Catania, Italy

[13] Inst Nucl Res, Moscow 117312, Russia

[14] Univ Paris 11, IPNO, F-91406 Orsay, France

[15] Univ Messina, Dipartmento Fis, I-98166 Messina, Italy

来源：

EUROPEAN PHYSICAL JOURNAL A | 2007年 / 33卷 / 02期

关键词：

D O I：

10.1140/epja/i2007-10439-9

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Beam asymmetry and differential cross-section for the reaction gamma p -> eta p were measured from production threshold to 1500MeV photon laboratory energy. The two dominant neutral decay modes of the eta-meson, eta -> 2 gamma and eta -> 3 pi(0) , were analyzed. The full set of measurements is in good agreement with previously published results. Our data were compared with three models. They all fit satisfactorily the results but their respective resonance contributions are quite different. The possible photoexcitation of a narrow state N(1670) was investigated and no evidence was found.

引用

页码：169 / 184

页数：16

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